Classifications

• • C—CHEMISTRY; METALLURGY
  • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
  • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
  • C23C24/00—Coating starting from inorganic powder
  • C23C24/02—Coating starting from inorganic powder by application of pressure only
  • C23C24/04—Impact or kinetic deposition of particles
• • C—CHEMISTRY; METALLURGY
  • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
  • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
  • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
• • C—CHEMISTRY; METALLURGY
  • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
  • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
  • C23C24/00—Coating starting from inorganic powder
• • C—CHEMISTRY; METALLURGY
  • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
  • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
  • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
  • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
  • C04B35/14—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silica
• • C—CHEMISTRY; METALLURGY
  • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
  • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
  • C23C24/00—Coating starting from inorganic powder
  • C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
• • C—CHEMISTRY; METALLURGY
  • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
  • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
  • C23C26/00—Coating not provided for in groups C23C2/00 - C23C24/00
• • C—CHEMISTRY; METALLURGY
  • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
  • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
  • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
  • C23C8/40—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using liquids, e.g. salt baths, liquid suspensions
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M8/00—Fuel cells; Manufacture thereof
  • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
  • H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
  • H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M8/00—Fuel cells; Manufacture thereof
  • H01M8/06—Combination of fuel cells with means for production of reactants or for treatment of residues
  • H01M8/0662—Treatment of gaseous reactants or gaseous residues, e.g. cleaning
  • H01M8/0675—Removal of sulfur
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M8/00—Fuel cells; Manufacture thereof
  • H01M8/10—Fuel cells with solid electrolytes
  • H01M8/12—Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte
  • H01M2008/1293—Fuel cells with solid oxide electrolytes
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
  • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
  • Y02E60/30—Hydrogen technology
  • Y02E60/50—Fuel cells

Definitions

• the present invention relates to a component comprising a refractory metal, characterized in that the surface of the component is at least partially coated with a layer of Y 2 O 3 .
• the invention further relates to the manufacture of the coated component and the use of Y 2 O 3 as a release agent in high temperature applications.
• auxiliaries and separating agents such as sleeves or applied separating layers of pastes
• these methods quickly reach their limits under extreme conditions.
• some auxiliaries and release agents cannot be used in a vacuum due to the risk of evaporation of their components and/or their operating temperature is limited due to decomposition.
• Al 2 O 3 , ZrO 2 or boron nitride sprays or powders are used for application in furnace construction.
• these variants are unsuitable for applications with temperatures around 1400° C., since in particular cross-contamination between components and the auxiliary and release agent is a problem.
• DE 102013213503 relates to a threaded connection for vacuum applications comprising a screw with external threads and a component with internal nut threads, wherein either the component or the screw or both are formed from a stainless austenitic steel, wherein different pairs of contact surfaces are created by coating the component/screw with coating materials different from the base materials, allowing mutual sliding without lubricants harmful to vacuum.
• a first member suitable for selectively engaging a second member comprising a coating and at least an engaging portion of the first member being coated in the coating, the coating being formed by vapor deposition to provide a thermochemically stable layer for temperatures up to 800° C.
• the coating may comprise one or more nitrides, oxides, or carbides of titanium, chromium, or aluminum.
• the coating may comprise one or more titanium nitride, chromium nitride, aluminum nitride, titanium oxide, chromium oxide, aluminum oxide, titanium carbide, chromium carbide, or aluminum carbide.
• the object of the present invention is to provide a coated component which is detachable even after use at temperatures in the range from 1000° C. to 1400° C., in particular up to 1900° C., wherein no cross-contamination with other components or treated products occurs.
• a layer of Y 2 O 3 allows the components to be used in different atmospheres, such as hydrogen or in a vacuum, without the risk of cross-contamination or a decomposition.
• the application of these layers also ensures the non-destructive replacement and non-destructive opening of components, respectively. Sintering of component parts can thus be prevented and it can hence be ensured that they remain detachable.
• Y 2 O 3 layer in particular a temperature application range of 1000° C. to 1400° C., in particular up to 1900° C. can be covered without risk of pollution/contamination or seizing, and the detachability of the components/machine elements can be achieved.
• connection is detachable if surfaces of components that are in direct contact with each other can be separated from each other again without damaging the components, and it is not detachable if the components have to be at least partially destroyed in order to separate the contacting surfaces from each other again.
• the coated component according to the invention is particularly suitable for high-temperature applications, i.e. for applications with temperatures in the range from 1000° C. to 2000° C., presently in particular 1400° C. to 1900° C.
• the component of the present invention consists of a refractory metal.
• a refractory metal is understood to be a metal selected from the group consisting of titanium, zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum, tungsten and rhenium and alloys of said metals, also referred to herein as refractory metal alloys.
• Refractory metal alloys are alloys with at least 50 at. % of one or more of the above-mentioned metals, preferably with at least 70 at. %, further preferred with at least 90 at. % and even more preferably with at least 95 at. %.
• the melting point of the refractory metal defined above is selected so that the component is suitable for the temperature targeted in use.
• the refractory metal has a melting point greater than 1400° C., more preferably greater than 1800° C., and more preferably greater than 2000° C.
• the component comprises molybdenum, besides unavoidable impurities, or a molybdenum alloy.
• the alloy comprises, in addition to molybdenum, up to 30% by weight of further of the above-mentioned refractory metal elements.
• compositions consist, in addition to molybdenum, of the following percentages of elements by weight:
• compositions are also included in which the proportions given here differ by up to 10%.
• the proportions given and the data refer to the element referred to in each case (e.g., Mo, C or W), irrespective of whether it is present in the molybdenum base material in elemental or bound form.
• the proportions of the various elements are determined by chemical analysis.
• component in the sense of the present invention includes individual parts (machine elements, components), in particular construction means which are suitable for the exchange or reversible fastening and loosening of machine elements, as well as assemblies composed of individual parts. Suitable components are in particular screws, nuts, pins, locating pins, washers, bolts, sheets, clips, tubes, rods and U-rails. As assemblies, mention may be made in particular of welded and riveted components, such as gas inlet tubes, heater suspensions and charging racks. The term components as a used in the present invention specifically excludes cutting parts of cutting tools.
• Preferred components as production aids are contact parts, such as separator sheets and washers.
• separator sheets are preferred.
• preferred components as production aids are components that have a thread, such as a screw or a nut.
• a screw is particularly preferred.
• the coating of the component consists of Y 2 O 3 .
• the Y 2 O 3 coating is typically applied to the component by brushing, spraying, printing or dipping of a Y 2 O 3 suspension and subsequently drying.
• the Y 2 O 3 suspension is an ethanol-based suspension.
• the Y 2 O 3 suspension is sintered onto the component in a hydrogen atmosphere at about 1800° C. for a period of 2 to 6 h. This improves the initial layer adhesion.
• the coated components have a Y 2 O 3 layer with a thickness in a range from 10 ⁇ m to 150 ⁇ m, preferably 20 ⁇ m to 110 ⁇ m, more preferably 40 ⁇ m to 80 ⁇ m and further preferably 50 ⁇ m to 70 ⁇ m.
• the thickness of the layer can be determined by lateral SEM measurement of a transverse section of the coated component.
• the component typically does not have any other layers of other materials. If other layers are present, for example to provide adhesion, the Y 2 O 3 layer is the outermost layer of the coated component.
• the layer is completely applied to the coated component's surface which is to be contacted with further components.
• the layer is only partially applied to the coated component's surface which is to be contacted with further components.
• the coated component's surface which is to be contacted with a further component is coated with the layer, further preferably 50 to 100%.
• the present invention can be used wherever good releasability of a component from a another component is required after the component has been used in high temperature applications. Accordingly, the use of Y 2 O 3 as a release agent to improve the releasability of components for high temperature applications is also subject-matter of the present invention.
• the yttria is used in the form of a layer applied by means of slurry coating, preferably on a component consisting of a refractory metal.
• TZM plate (molybdenum with a weight fraction of 0.5 Ti and 0.08 Zr as well as 0.01 to 0.04 C) 140 ⁇ 80 ⁇ 9 mm, 9 mm deep through bore milled with M6 thread
• Molybdenum washer 18 ⁇ 6, 4 ⁇ 1.5 mm
• Molybdenum screw M6 ⁇ 12 mm
• the ZrO 2 and TaC coated screws already show seizing at low temperatures as of 400° C. and are therefore unsuitable for high-temperature applications.
• the ZrC-coated screws show seizing above 1000° C. and are therefore also unsuitable for high-temperature applications.
• ZrO 2 slurry via corrosion lab (ISTO) as pump spray separation only possible with tools; slurry “baked” onto sheets; unsuitable.
• the sheets are separable after annealing, but the spray layer is mainly loose on the sheet. Contamination of the plant due to flaking of the ZrO 2 spray layer; unsuitable.
• the solid sticks to the sheet and the sheets can only be separated with resistance.
• the solid is very difficult to remove and in some cases cannot be removed completely, and a an imprint of the solid appears on the opposite side; unsuitable.
• the suspension shows poor wetting of the sheets in the brush application process. After annealing, the sheets are strongly stuck together in the sandwich and the coating cannot be removed from the coated sheets. In some cases, residues of the coating are found on uncoated sheet sides; unsuitable.
• the suspension shows good wetting of the sheets in the brush application process.
• the sheets can be separated well after annealing. There are no residues of the coating on the uncoated sheet sides. Additional microsection analysis showed that there is no surface diffusion into the sheet; suitable.
• Y 2 O 3 is excellent as a release agent in high temperature applications.
• 1 mm molybdenum sheets (area 265 mm ⁇ 265 mm) were coated on both sides with a Y 2 O 3 suspension and used for several stacking anneals 1850° C. for 6 h in a hydrogen atmosphere as separator sheets between molybdenum charging sheets (each paired side by side; 2 mm ⁇ 130 mm ⁇ 260 mm).
• separator sheets between molybdenum charging sheets (each paired side by side; 2 mm ⁇ 130 mm ⁇ 260 mm).
• a Mo— Y 2 O 3 separator plate was followed by two charging plates placed side by side, followed by a separator plate, and so on.
• the charging plate layers were rotated alternately by 90° to form a cross-layer structure.
• the stacks comprised between 20 and 25 charging plate layers.
• the separator sheets were still operational after 13 applications.

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• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Materials Engineering (AREA)
• Organic Chemistry (AREA)
• Mechanical Engineering (AREA)
• Metallurgy (AREA)
• Manufacturing & Machinery (AREA)
• Life Sciences & Earth Sciences (AREA)
• Sustainable Development (AREA)
• Sustainable Energy (AREA)
• Electrochemistry (AREA)
• General Chemical & Material Sciences (AREA)
• Ceramic Engineering (AREA)
• Structural Engineering (AREA)
• Other Surface Treatments For Metallic Materials (AREA)
• Laminated Bodies (AREA)

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• 2020
  • 2020-12-15 AT ATGM50251/2020U patent/AT17485U1/de unknown
• 2021
  • 2021-11-25 JP JP2023535585A patent/JP2023552481A/ja active Pending
  • 2021-11-25 US US18/257,646 patent/US20240117496A1/en active Pending
  • 2021-11-25 CN CN202180081827.8A patent/CN116601330A/zh active Pending
  • 2021-11-25 WO PCT/AT2021/060447 patent/WO2022126158A1/de not_active Ceased
  • 2021-11-25 EP EP21843577.4A patent/EP4263903A1/de active Pending

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